JP2679997B2 - DC circuit breaker - Google Patents
DC circuit breakerInfo
- Publication number
- JP2679997B2 JP2679997B2 JP62257204A JP25720487A JP2679997B2 JP 2679997 B2 JP2679997 B2 JP 2679997B2 JP 62257204 A JP62257204 A JP 62257204A JP 25720487 A JP25720487 A JP 25720487A JP 2679997 B2 JP2679997 B2 JP 2679997B2
- Authority
- JP
- Japan
- Prior art keywords
- commutation capacitor
- circuit
- current
- charging
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle for interrupting DC
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は直流遮断器に関するもので特に直流主線路か
ら直接充電できる転流コンデンサを用いた逆電流を挿入
する方式の改良に関するものである。
〔従来の技術〕
第３図は、従来の逆電流挿入方式の直流遮断器の回路
図を示す。このような、直流遮断器は「電気評論1980年
９月号 直流遮断器第791頁〜第795頁」に記載されてい
る。
第３図に示すように従来の逆電流挿入方式の直流遮断
器は直流線路の直流主線路１に直列に挿入された遮断部
２と、この遮断部２に並列に接続された転流コンデンサ
3,リアクトル４及びサイリスタ又はトリガギヤツプより
成る第１のスイツチ５の直列接続した第1LC共振回路に
より構成されている。なお第４図に於いて1aは直流主線
路１の電源側端子、1bは直流主線路１の負荷側端子、６
は転流コンデンサ３に並列に設けられた充電装置、７は
負極母線、7aは負極母線７の電源側端子、7bは負極母線
７の負荷側端子である。更に、負荷側端子（1b,7b）間
に負荷８が接続されている。一方電源側端子（1a,7a）
間に直流電源Ｖが接続されている。
第３図に於いて、遮断動作を行う場合は遮断部２に開
極指令を与え、遮断部２が開極した後第１のスイツチを
構成するサイリスタスイツチ５を投入、すなわち点弧
し、予め充電装置６により充電してある転流コンデンサ
３から放電々流i2を遮断部２の通電電流i1と逆向き方向
に流し込むと、遮断部２を通過する電流の合計（i1＋
i2）は、電流零点を生じ、その結果遮断部２のアークは
消弧し、主線路電流i2は転流コンデンサ３に転流し、限
流が完了する。
〔発明が解決しようとする問題点〕
しかしながら、従来技術は転流コンデンサ３の充電の
ために専用の充電装置６を必要とした。これに対し直流
主線路１から直接充電を行う場合には、充電極性の都合
により遮断部２の負荷側から充電しなければならない
が、遮断部２を投入後、転流コンデンサ３の充電が終る
までの間遮断機能を放棄しなければならず、実用に供す
ることができなかつた。また、専用の充電装置６を設け
る場合は、電源の信頼度の面から直流バツテリーまたは
直流主線路１よりインバータを介して充電装置を接続す
る必要があり、装置が複雑になると共に直流主線路の信
頼性を低下させる欠点を有していた。
本発明の主な目的は、直流主線路から直流充電するこ
とを可能とした転流コンデンサを有する直流遮断部を提
供する点にある。
本発明の別の目的は、転流コンデンサに並列に電磁反
発コイルおよびスイツチ手段を接続してLC共振放電行な
い、上記転流コンデンサの充電極性を反転することによ
り、充電装置を不要とした安価で簡単な構造の直流遮断
器を提供する点にある。
〔問題点を解決するための手段〕
上記目的は、直流回路の一方の極と負荷の間に直列に
接続される遮断部と、
上記遮断部に並列に接続された転流コンデンサとリア
クトルと一方向性の第１スイッチからなる第1LC共振回
路と、
上記直流回路の一方の極と他方の極間に接続された上
記転流コンデンサと充電抵抗とダイオードからなる充電
回路と、
上記転流コンデンサに並列接続された電磁反発コイル
と一方向性の第２スイッチとからなる第2LC共振回路と
からなり、
上記充電回路により常時上記転流コンデンサを充電状
態とし、上記第２スイッチを点弧することにより、電磁
反発コイルの電磁反発力で遮断部を開放するとともに、
上記第2LC共振回路により上記転流コンデンサを逆方向
に充電し、しかる後、上記第１スイッチを導通させて、
上記第1LC共振回路により上記転流コンデンサからの充
電電流を上記遮断部に放電させてアークを消弧させるこ
とによって達成される。
〔作用〕
転流コンデンサは常時直流主線路から充電抵抗を介し
て充電される。遮断部の開極時には第２のスイツチ、例
えば第２のサイリスタスイツチが点弧されると、転流コ
ンデンサは電極反発コイル、第２のサイリスタスイツチ
を通して共振電流が流れ、共振電流が電磁反発コイルに
流れると電磁反発力が生じ、遮断部は開極を開始する。
この間半サイクル目の負電位側の交流正弦波の共振電流
は、第２のサイリスタスイツチにより阻止されるが、次
の半サイクル目の正電位側の交流正弦波の共振電流は、
転流コンデンサを充電し、転流コンデンサの充電極性を
反転する。従つて、遮断部が開極した時点で第１のスイ
ツチ例えば第１のサイリスタスイツチを点弧し、転流コ
ンデンサからリアクトルを通して遮断部にその通電々流
と逆向きの放電々流が流れて、主線路電流が遮断される
が、この間に転流コンデンサは直流主線路の正極側から
負極側に向つて流れる電流によつて、直接充電できる。
〔実施例〕
以下、本発明の実施例を第１図により説明する。第１
図は本発明による逆電流挿入方式の直流遮断器の一実施
例の回路図である。第１図は第３図に使用した部品と同
一部品には同一符号を附して説明を省略する。
転流コンデンサ３は、その一方端を正極側の直流主線
路の電源側端子1a側の電源側に接続し、他方端を充電抵
抗９およびダイオード10を介して直流主線路１の負極母
線７に接続する充電電流を流す回路と共に、転流コンデ
ンサ３に並列に電磁反発コイル11と第２のスイツチを構
成する第２のサイリスタスイッチ12との直列接続した第
2LC共振回路を接続する。尚、第2LC共振回路と第1LC共
振回路と充電回路との接続個所を接続点と称し、接続点
を・で示す。
次に第１図に於いて、本発明による直流遮断器の転流
順序を説明する。
（ｉ）転流コンデンサ３を常時直流主線路１の直流電源
Ｖ側から充電抵抗９及びダイオード10を介して直接＋で
示す如く、充電電流i3が流れる。
（ii）次に第２のサイリスタスイツチ12が点弧され、そ
の結果転流コンデンサ３は電磁反発コイル11および第２
のサイリスタスイツチ12を通してLC共振放電する。この
時、電磁反発コイル11にLC共振電流i4が流れると、電磁
反発力が生じ遮断部２は開極を開始する。LC共振電流i4
は半サイクル目の負電位側の交流正弦波電流が第２のサ
イリスタスイツチ12により阻止されるが、次の半サイク
ル目の正電位側の交流正弦波電流で転流コンデンサ３を
充電し、充電極性はで示す如く反転する。
（iii）遮断部２が開極した時点で第１のサイリスタス
イツチ５を点弧すると、転流コンデンサ３からリアクト
ル４及び第１のサイリスタスイツチ５を通して遮断部２
に通電電流i1と逆向きの放電電流i5が流れて遮断部２を
通過する電流は電流零点を生じ、その結果遮断部２のア
ークは消弧される。
（iv）遮断部２のアークが完全に消え遮断されると主線
路電流は転流コンデンサ３へ転流する。すなわち直流電
源Ｖ−転流コンデンサ３−リアクトル４−第１のサイリ
スタスイツチ５−負荷８−負極母線７を通して転流電流
i6が流れる。
以上の転流順序により転流コンデンサ３を直接直流主
線路１から充電できるようにしたので、簡単な構造の直
流遮断器を得ることができるようになつた。
すなわち本発明によれば、転流コンデンサ３と並列に
電磁反発コイル11と第２のサイリスタスイツチ12との直
列接続体を接続し、転流コンデンサ３を充電抵抗９およ
びダイオード10を介して負極母線７および直流主線路１
の電源側間に接続した。このようにすることにより、転
流コンデンサ３は遮断部３の開閉状態に無関係に直流主
線路１より充電抵抗９及びダイオード10を介して第１図
の左側が＋の極性に充電される。次に遮断部２の遮断指
令が与えられると、第２のサイリスタスイツチ12が点弧
され、転流コンデンサ３は電磁反発コイル11、第２のサ
イリスタスイツチ12を通して共振放電する。電磁反発コ
イル11にLC共振電流i4が流れると、電磁反発力が生じ遮
断部２は開極を開始する。このLC共振電流i4は半サイク
ル目の負電位側の交流正弦波電流が第２のサイリスタス
イッチ12により阻止されるが、次の半サイクル目の正電
位側の交流正弦波電流で転流コンデンサ３を充電し、転
流コンデンサ３の充電極性は反転し、図中右側が＋の極
性になる。遮断部２が十分開極した時点で第１のサイリ
スタスイツチ５が点弧され、転流コンデンサ３はリアク
トル4,第１のサイリスタスイツチ5,遮断部２を通して共
振放電し、遮断部２には通電々流である主線路電流i1と
逆向きの電流i5が流れて電流零点が生じ遮断部２は消弧
し、主線路電流i1は転流コンデンサ３に転流し、限流を
完了する。
一般に転流コンデンサ３の充電極性反転用の共振回路
として用いた電磁反発コイル11の出力は、相対する導電
体との間隔が増すと急激に減少する特性があり、電磁反
発コイル11の有効出力の大半はその共振電流の半サイク
ル目までに生じているので、電磁反発コイル11の共振電
流を半サイクルで阻止することは殆ど出力低下をもたら
さない。従つて半サイクルで阻止することにより、その
後回路の抵抗分で消費されるべきエネルギーを転流エネ
ルギーとして利用できるので、全体の転流コンデンサの
充電エネルギーを低減することができる。
第２図は、本発明の第２の実施例を示す回路図で、第
１図に示したリアクトル４の設置個所を変えたものであ
る。即ち、第２図においてリアクトル４は、4a,4b,4c,4
dのいずれの個所にも設置でき、第１図の第１の実施例
を全く同様の効果が得られる。更に、電線のリアクタン
スＬを用いても良いので、リアクトル４を設けない場合
もある。
このように本実施例によれば、直流主線路１の電源側
より直接転流コンデンサ３を充電できるので、遮断部２
の開閉状態に無関係に所定の充電々圧および極性が得ら
れ、専用の充電装置が不要となり、経済性のある直流遮
断器を得ることができる。また転流コンデンサ３の充電
エネルギーの有効利用が可能となり、転流コンデンサ３
の容量を低減することができる。
なお、遮断部２としては真空遮断器，ガス遮断器，空
気遮断器等が考えられるが、真空遮断器は高周波遮断性
能がすぐれており、転流コンデンサ3,リアクトル４で構
成される転流回路の共振放電々流を高周波化し、転流コ
ンデンサ３の容量を低減できること、および小さな開極
寸法で十分な消弧能力を有するため高速度遮断に適する
ことなどにより、この種の遮断部２としても最も適して
いると考えられる。
また、転流コンデンサ３の充電極性反転用の共振放電
回路として電磁反発コイル11を用いて説明したが、遮断
部２を開極側へ駆動するためのコイルであれば同様の作
用効果を発することができる。
〔発明の効果〕
上述のように本発明は、転流コンデンサに並列に電磁
反発コイルおよびスイツチ手段を接続してLC共振放電行
ない、転流コンデンサの充電極性を反転させるようにし
て、直流主線路から直接転流コンデンサを充電すること
ができるようになり、充電装置を不要とした安価で簡単
な構造の直流遮断器を提供することができるようになつ
た。The present invention relates to a DC circuit breaker, and more particularly to an improvement of a method of inserting a reverse current using a commutation capacitor that can be directly charged from a DC main line. [Prior Art] FIG. 3 is a circuit diagram of a conventional reverse current insertion type DC circuit breaker. Such a DC circuit breaker is described in "Electrical Review, September 1980, DC Circuit Breaker, pages 791 to 795". As shown in FIG. 3, a conventional reverse current insertion type DC circuit breaker includes a circuit breaker 2 inserted in series in a DC main line 1 of a DC line and a commutation capacitor connected in parallel to the circuit breaker 2.
3, a first LC resonance circuit in which a reactor 4 and a first switch 5 composed of a thyristor or a trigger gear are connected in series. In FIG. 4, 1a is a power source side terminal of the DC main line 1, 1b is a load side terminal of the DC main line 1, and 6
Is a charging device provided in parallel with the commutation capacitor 3, 7 is a negative bus, 7a is a power supply side terminal of the negative bus 7, and 7b is a load side terminal of the negative bus 7. Further, the load 8 is connected between the load side terminals (1b, 7b). On the other hand, power supply side terminals (1a, 7a)
A DC power supply V is connected between them. In the case of performing the breaking operation in FIG. 3, an opening command is given to the breaking unit 2, and after the breaking unit 2 is opened, the thyristor switch 5 forming the first switch is turned on, that is, ignited, in advance. When the discharge continuous current i 2 is flown from the commutation capacitor 3 charged by the charging device 6 in the direction opposite to the energization current i 1 of the breaking unit 2, the total current (i 1 +
i 2 ) causes a current zero point, and as a result, the arc of the breaker 2 is extinguished, and the main line current i 2 commutates to the commutation capacitor 3 to complete the current limiting. [Problems to be Solved by the Invention] However, the prior art requires a dedicated charging device 6 for charging the commutation capacitor 3. On the other hand, in the case of directly charging from the DC main line 1, it is necessary to charge from the load side of the breaking unit 2 because of the charging polarity, but after charging the breaking unit 2, the charging of the commutation capacitor 3 ends. Until then, the blocking function had to be abandoned, and it could not be put to practical use. Further, when the dedicated charging device 6 is provided, it is necessary to connect the charging device from the DC battery or the DC main line 1 through an inverter in terms of the reliability of the power source, which makes the device complicated and the DC main line It had the drawback of reducing reliability. A main object of the present invention is to provide a DC cutoff unit having a commutation capacitor that enables DC charging from a DC main line. Another object of the present invention is to connect an electromagnetic repulsion coil and a switch means in parallel to a commutation capacitor to perform LC resonance discharge, and to reverse the charging polarity of the commutation capacitor, thereby reducing the cost of the charging device and eliminating the need for a charging device. The point is to provide a DC circuit breaker with a simple structure. [Means for Solving Problems] The above-mentioned object is to provide a breaker connected in series between one pole of a DC circuit and a load, a commutation capacitor and a reactor connected in parallel to the breaker. A first LC resonant circuit including a directional first switch, a commutation capacitor connected between one pole and the other pole of the DC circuit, a charging circuit including a charging resistor and a diode, and the commutation capacitor. By a second LC resonance circuit consisting of an electromagnetic repulsion coil and a unidirectional second switch connected in parallel, the charging circuit constantly charges the commutation capacitor, and the second switch is ignited. , The electromagnetic repulsion coil's electromagnetic repulsion force opens the breaking part,
The commutation capacitor is charged in the reverse direction by the second LC resonance circuit, and then the first switch is turned on,
The first LC resonance circuit discharges the charging current from the commutation capacitor to the breaker to extinguish the arc. [Operation] The commutation capacitor is always charged from the DC main line via the charging resistor. When the second switch, for example, the second thyristor switch is ignited when the breaking portion is opened, a resonance current flows through the commutation capacitor through the electrode repulsion coil and the second thyristor switch, and the resonance current flows through the electromagnetic repulsion coil. When flowing, an electromagnetic repulsive force is generated, and the cutoff portion starts opening.
During this period, the resonance current of the AC sine wave on the negative potential side of the half cycle is blocked by the second thyristor switch, but the resonance current of the AC sine wave on the positive potential side of the next half cycle is
Charge the commutation capacitor and reverse the charge polarity of the commutation capacitor. Therefore, the first switch, for example, the first thyristor switch is ignited when the breaker opens, and the discharge current in the opposite direction to the energization current flows from the commutation capacitor through the reactor to the breaker. While the main line current is interrupted, the commutation capacitor can be directly charged by the current flowing from the positive side to the negative side of the DC main line during this period. Embodiment An embodiment of the present invention will be described below with reference to FIG. First
FIG. 1 is a circuit diagram of an embodiment of a reverse current insertion type DC circuit breaker according to the present invention. In FIG. 1, the same parts as those used in FIG. The commutation capacitor 3 has one end connected to the power supply side on the power supply side terminal 1a side of the DC main line on the positive side, and the other end connected to the negative bus 7 of the DC main line 1 via the charging resistor 9 and the diode 10. In addition to the circuit for supplying the charging current to be connected, the electromagnetic repulsion coil 11 and the second thyristor switch 12 constituting the second switch are connected in series in parallel with the commutation capacitor 3.
2 Connect the LC resonance circuit. The connection point between the second LC resonance circuit, the first LC resonance circuit and the charging circuit is called a connection point, and the connection point is indicated by. Next, referring to FIG. 1, the commutation sequence of the DC circuit breaker according to the present invention will be described. (I) The charging current i 3 always flows through the commutation capacitor 3 from the DC power source V side of the DC main line 1 via the charging resistor 9 and the diode 10 directly as indicated by +. (Ii) Next, the second thyristor switch 12 is ignited, and as a result, the commutation capacitor 3 becomes the electromagnetic repulsion coil 11 and the second
LC resonant discharge is performed through the thyristor switch 12. At this time, when the LC resonance current i 4 flows through the electromagnetic repulsion coil 11, an electromagnetic repulsion force is generated and the cutoff portion 2 starts opening. LC resonance current i 4
The AC sinusoidal current on the negative potential side of the half cycle is blocked by the second thyristor switch 12, but the commutation capacitor 3 is charged and charged by the AC sinusoidal current on the positive potential side of the next half cycle. The polarity is inverted as shown by. (Iii) When the first thyristor switch 5 is ignited at the time when the breaking unit 2 is opened, the breaking unit 2 is passed from the commutation condenser 3 through the reactor 4 and the first thyristor switch 5.
The discharge current i 5 flowing in the opposite direction to the energizing current i 1 flows through the breaker 2, and the current passing through the breaker 2 has a current zero point. As a result, the arc of the breaker 2 is extinguished. (Iv) When the arc of the breaker 2 is completely extinguished and cut off, the main line current is commutated to the commutation capacitor 3. That is, DC power source V-commutation capacitor 3-reactor 4-first thyristor switch 5-load 8-negative electrode bus 7
i 6 flows. Since the commutation capacitor 3 can be directly charged from the DC main line 1 by the above commutation sequence, a DC circuit breaker having a simple structure can be obtained. That is, according to the present invention, the series connection body of the electromagnetic repulsion coil 11 and the second thyristor switch 12 is connected in parallel with the commutation capacitor 3, and the commutation capacitor 3 is connected to the negative electrode bus bar via the charging resistor 9 and the diode 10. 7 and DC main line 1
Connected between the power supply side. By doing so, the commutation capacitor 3 is charged to the positive polarity on the left side of FIG. 1 via the charging resistor 9 and the diode 10 from the DC main line 1 irrespective of the open / close state of the cutoff portion 3. Next, when the cutoff command of the cutoff unit 2 is given, the second thyristor switch 12 is ignited, and the commutation capacitor 3 is resonantly discharged through the electromagnetic repulsion coil 11 and the second thyristor switch 12. When the LC resonance current i 4 flows through the electromagnetic repulsion coil 11, an electromagnetic repulsion force is generated and the cutoff portion 2 starts opening. In this LC resonance current i 4, the AC sinusoidal current on the negative potential side of the half cycle is blocked by the second thyristor switch 12, but the commutation capacitor is generated by the AC sinusoidal current on the positive potential side of the next half cycle. 3 is charged, the charge polarity of the commutation capacitor 3 is reversed, and the right side in the figure has a positive polarity. The first thyristor switch 5 is ignited when the breaking part 2 is sufficiently opened, and the commutation capacitor 3 is resonantly discharged through the reactor 4, the first thyristor switch 5 and the breaking part 2, and the breaking part 2 is energized. A current i 5 in the opposite direction to the main line current i 1 which is a current flow causes a current zero point to extinguish the interruption part 2, and the main line current i 1 commutates to the commutation capacitor 3 to complete the current limiting. . Generally, the output of the electromagnetic repulsion coil 11 used as a resonance circuit for reversing the charging polarity of the commutation capacitor 3 has a characteristic that it rapidly decreases as the distance between the opposing conductors increases, and the effective output of the electromagnetic repulsion coil 11 Most of the current is generated by the half cycle of the resonance current, so blocking the resonance current of the electromagnetic repulsion coil 11 in the half cycle causes almost no output reduction. Therefore, by blocking in half cycle, the energy to be consumed by the resistance of the circuit thereafter can be used as commutation energy, so that the charging energy of the entire commutation capacitor can be reduced. FIG. 2 is a circuit diagram showing a second embodiment of the present invention, in which the installation location of the reactor 4 shown in FIG. 1 is changed. That is, in FIG. 2, the reactor 4 includes 4a, 4b, 4c, 4
It can be installed at any position of d, and the same effect as the first embodiment of FIG. 1 can be obtained. Further, since the reactance L of the electric wire may be used, the reactor 4 may not be provided in some cases. As described above, according to this embodiment, the commutation capacitor 3 can be directly charged from the power source side of the DC main line 1, so that the shutoff unit 2
A predetermined charging voltage and polarity can be obtained irrespective of the open / closed state of the device, a dedicated charging device is not required, and an economical DC circuit breaker can be obtained. In addition, the charging energy of the commutation capacitor 3 can be effectively used, and the commutation capacitor 3
The capacity can be reduced. The circuit breaker 2 may be a vacuum circuit breaker, a gas circuit breaker, an air circuit breaker, or the like, but the vacuum circuit breaker has excellent high-frequency circuit breaking performance and a commutation circuit composed of a commutation capacitor 3 and a reactor 4. The resonance discharge current can be increased in frequency to reduce the capacity of the commutation capacitor 3 and the small opening size has a sufficient arc extinguishing ability, which is suitable for high speed interruption. Considered to be the most suitable. Further, although the electromagnetic repulsion coil 11 is used as the resonance discharge circuit for reversing the charging polarity of the commutation capacitor 3, the coil for driving the cutoff portion 2 to the opening side has the same effect. You can [Effects of the Invention] As described above, according to the present invention, the electromagnetic repulsion coil and the switch means are connected in parallel to the commutation capacitor to perform LC resonance discharge, and the charging polarity of the commutation capacitor is reversed to obtain the DC main line. From now on, it is possible to directly charge the commutation capacitor, and it is possible to provide a direct current circuit breaker which does not require a charging device and has an inexpensive and simple structure.
【図面の簡単な説明】
第１図は本発明による逆電流挿入方式の直流遮断器の回
路図、第２図は本発明の他の実施例の直流遮断器の回路
図、第３図は従来の逆電流挿入方式の直流遮断器の回路
図である。
１……直流主線路、1a……電源側端子、1b……負荷側端
子、２……遮断部、３……転流コンデンサ、４……リア
クトル、５……第１のサイリスタスイツチ、７……充電
抵抗、11……第２のサイリスタスイツチ。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a reverse current insertion type DC circuit breaker according to the present invention, FIG. 2 is a circuit diagram of a DC circuit breaker according to another embodiment of the present invention, and FIG. FIG. 3 is a circuit diagram of a reverse current insertion type DC circuit breaker of FIG. 1 ... DC main line, 1a ... Power supply side terminal, 1b ... Load side terminal, 2 ... Breaking part, 3 ... Commutation capacitor, 4 ... Reactor, 5 ... First thyristor switch, 7 ... … Charge resistance, 11 …… Second thyristor switch.
Claims (1)
遮断部と、 上記遮断部に並列に接続された転流コンデンサとリアク
トルと一方向性の第１スイッチからなる第1LC共振回路
と、 上記直流回路の一方の極と他方の極間に接続された上記
転流コンデンサと充電抵抗とダイオードからなる充電回
路と、 上記転流コンデンサに並列接続された電磁反発コイルと
一方向性の第２スイッチとからなる第2LC共振回路とか
らなり、 上記充電回路により常時上記転流コンデンサを充電状態
とし、上記第２スイッチを点弧することにより、電磁反
発コイルの電磁反発力で遮断部を開放するとともに、上
記第2LC共振回路により上記転流コンデンサを逆方向に
充電し、しかる後、上記第１スイッチを導通させて、上
記第1LC共振回路により上記転流コンデンサからの充電
電流を上記遮断部に放電させてアークを消弧させことを
特徴とする直流遮断器。(57) [Claims] A breaker connected in series between one pole of the DC circuit and the load; a first LC resonant circuit consisting of a commutation capacitor, a reactor and a unidirectional first switch connected in parallel to the breaker; A charging circuit composed of the commutation capacitor, a charging resistor and a diode connected between one pole and the other pole of the DC circuit, an electromagnetic repulsion coil connected in parallel with the commutation capacitor and a unidirectional second A second LC resonance circuit composed of a switch, and the commutation capacitor is constantly charged by the charging circuit, and the second switch is ignited to open the breaking portion by the electromagnetic repulsion force of the electromagnetic repulsion coil. At the same time, the commutation capacitor is charged in the reverse direction by the second LC resonance circuit, and then the first switch is turned on to charge the commutation capacitor by the first LC resonance circuit. A direct current circuit breaker, characterized in that an arc is extinguished by discharging an electric current to the breaking portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24299686 | 1986-10-15 | ||
| JP61-242996 | 1986-10-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63225447A JPS63225447A (en) | 1988-09-20 |
| JP2679997B2 true JP2679997B2 (en) | 1997-11-19 |
Family
ID=17097339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62257204A Expired - Lifetime JP2679997B2 (en) | 1986-10-15 | 1987-10-14 | DC circuit breaker |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4805062A (en) |
| JP (1) | JP2679997B2 (en) |
| DE (1) | DE3734989A1 (en) |
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| FR2655767A1 (en) * | 1989-12-08 | 1991-06-14 | Alsthom Gec | HIGH VOLTAGE CONTINUOUS CURRENT LIMITING CIRCUIT BREAKER. |
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| DE970945C (en) * | 1949-10-21 | 1958-11-13 | Fruengel Frank Dr Ing | High voltage switch for capacitor discharge circuits of pulse welding machines |
| US3548256A (en) * | 1968-07-05 | 1970-12-15 | Gen Electric | High voltage d-c circuit breaker |
| FR2076429A5 (en) * | 1970-01-14 | 1971-10-15 | Merlin Gerin | |
| DE2742965A1 (en) * | 1976-09-30 | 1978-04-06 | Tokyo Shibaura Electric Co | DC circuit breaker unit for high voltage systems - having circuit breaker, oscillator and metal oxide varistor in parallel |
| JPS54149873A (en) * | 1978-05-18 | 1979-11-24 | Tokyo Shibaura Electric Co | Breaker |
| JPS6065411A (en) * | 1983-09-21 | 1985-04-15 | 株式会社日立製作所 | Line rechargeable DC circuit breaker |
-
1987
- 1987-10-14 US US07/108,009 patent/US4805062A/en not_active Expired - Lifetime
- 1987-10-14 JP JP62257204A patent/JP2679997B2/en not_active Expired - Lifetime
- 1987-10-15 DE DE19873734989 patent/DE3734989A1/en active Granted
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Also Published As
| Publication number | Publication date |
|---|---|
| JPS63225447A (en) | 1988-09-20 |
| US4805062A (en) | 1989-02-14 |
| DE3734989C2 (en) | 1990-02-01 |
| DE3734989A1 (en) | 1988-04-28 |
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